Seam-stay guide for sewing-machines



(No Model.)

W. DUGHEMIN.

SEAM STAY GUIDE FOR SEWING MACHINES.

Patented Aug. 9, 1881.

' 'NITED STATES PATENT QTFIcE.

\VIIlLIAM DUOHEMIN, OF BOSTON, MASSACHUSETTS.

SEAM-STAY GUIDE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 245,287, dated August 9, 1881.

Application filed April 1, 1880. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM DUOHEMIN, a subject of her Britannic Majesty, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Seam-Stay Guide for Sewing-Machines, of which the following is a specification.

The object of my invention is to construct the throat-plates of sewing-machines in such a manner that they will serve as stay-guides, and this object is accomplished by the construction illustrated in theaccom pan yin g drawings, in which Figure 1 is a plan view of a throat-plate constructed according to my invention. Fig. 2 is a similar View, showing the feed-dog in position. Fig. 3 is an under side view. Fig. at is a partial longitudinal section on vthe line 3 3, Fig. 1. Figs. 5, 6, and 7 are cross-sections of my throat-plate, and Fig. 8 represents a staypiece.

A represents a throat-plate having the usual feed-opening, b, and needle hole or throat e. A recess or passage, d, is formed in the under side of said throat-plate, said passage extending horizontally from the front end thereof to a point opposite the feed-opening b, when it is inclined gently upward through the top surface of the throat-plate, at a, thus forming, in

0 connection with the bed 9 of the machine, an

inclosed and continuous passage through which a staying-piece may be fed to the needle for the purpose of uniting the said staying-piece to the fabric being sewed.

The recess or passage (1 may be made of any desired width, according to the width of the staying-piece which is to be used. This passage d opens at one side into the feed-openin g, and from the point h toward the front end of the throat-plate one side of said passage is inclined at a small angle from the other side, so that said passage converges or grows gradually narrower from the end of the throat-plate to point h, as shown in the drawings.

In the use of my device the stay-piece is in-. troduced through the passage (1, and is drawn up through the opening a above the feed-dog c and beneath the fabric being sewed, and is fed forward with the fabric and united therewith by the usual stitch-forming devices.

If a wide margin of the stay-piece outside of the line of stitching is required, the staypiece must be the width of the front end of the passage (1, and to introduce said stay-piece it will be convenient to cut it in the form shown at Fig. 8. Thus when the stay-piece is drawn forward one side thereof will press against the feed-dog c, and when said dog falls below the surface of the throat-plate, the passage 61 being open on the side toward the feed-dog, the eX- tra width of the stay-piece presses outward and is flattened out on the feed-dog by the presser-foot of the machine.

If only a small margin of the stay-piece outside of the line ofstitching is desired, said staypiece will be only the width of the passage (1 opposite the feed-openin g Z).

I am aware that it is not new to provide a throat-plate with a passage-way for guiding a strip of braid or other fabric to the stitch-forming mechanism of a sewing-machine, and I do not therefore claim such construction, broad] y; but

What I do claim, and wish to secure by LettersPatent, is-- The sewing-machine throat-plate A, having the converging passage d extending horizontally from one end of said throat-plate to a point opposite the feed-opening b, and then inclined upward through the top surface of said throat-plate, said passage at being open at that part thereof opposite said feed-opening, substantially as and for the purpose specified.

In testimony whereofl have signed my name to this specification, in the presence of two subscribing witnesses, this 20th day of March A. D. 1880.

WILLIAM DUOHEMIN.

Witnesses:

(J. F. BROWN, H. G. WADLiN. 

